EADOG

Page 2

ELECTRONIC ASSEMBLY reserves

the right to change specifications

without prior notice. Printing and

typographical

errors

reserved.

EA DOG

The EA DOG

series. It, too, has pins that allow it to be mounted quickly and easily. 7 different optional LED backlights are

available. These can be combined with 5 different display technologies, making it possible to have up to

around 20 different designs.

Designed for compact, handheld devices, this modern LCD series offers a number of benefits with and without

backlighting:

* Extremely compact (68x51 mm) with a large viewing area of 64x36 mm

* Super-flat: 2.8 mm without backlight module, and only 6.5 mm with a b./l. module mounted

* Serial SPI interface (4-wire)

* Single supply +3.0 V or +3.3 V or dual power supply +1.8..3.3V

* Typical power consumption of only 320µA in full operation (white LED backlight from 5mA)

* Easily mounted by soldering

* Wide range of design variants orderable as single units, backlighting color changes possible

CONTRAST ADJUSTMENT

The contrast can be set by means of a command for all the displays in the EA DOG

setting of the display must be set once by the software, and is then kept constant throughout the entire operating

temperature range (-20..+70°C), thanks to the integrated temperature compensation.

LED BACKLIGHT

7 different variants are available for

individual backlighting: white, yellow/green,

green, blue, red, amber and a full-color

version.

There are 3 separate LED paths available

for each monochrome backlight that can

be switched in parallel or in series to suit

the system voltage. This means that most

backlights can be run at either 3.3 V or a

higher voltage.

To operate the backlight, we recommend

a current source (e.g. CAT4238TD) or an

external series resistor to limit the current.

This can be calculated from R=U/I; you can

find the values in the table on the right. To

prolong the life of the backlights, we

recommend that you use a current source.

The operating life of the yellow/green, red and amber backlights is 100,000 hours. The life of the white and blue

backlights is considerably shorter. We recommend that you dim these or switch them off whenever possible.

Important: Never connect the backlight LEDs directly to a 5 V/3.3 V supply as this will immediately

destroy the LEDs. Always use a current source. Please note that derating applies at temperatures

exceeding +25°C.

ASSEMBLING

First, clip the display and backlight modules together by gently pushing the display pins through the corresponding

holes on the backlight module. Then insert the entire module into the socket, or into the soldering holes on the

pcb. The backlight pins (the 2 rows with 3 pins at the bottom) must be soldered on the top side as well to ensure

good contact between the modules.

Important: The display has 2 protective films on the top and the bottom (except the version DOG

that does have 1 foil on the top only), and there is also one on the backlight. These must be removed.

Make sure that neither display nor backlight will never come into contact with any kind of liquid like

Fluxer, Cleaner, Water.

LED backlight

Forward voltage (V)

Current

max.

(mA)

Limiting resistor

(ohm, each

path)

min

typ

max

@3,3 V

@5 V

yellow/green

EA LED68x51-G

2,1

60

20

47

white

EA LED68x51-W

3,3

45

CAT4238

39

amber

EA LED68x51-A

2,1

60

24

52

green

EA LED68x51-E

3,1

45

CAT4238

33

blue

EA LED68x51-B

3,3

45

CAT4238

39

red

EA LED68x51-R

2

60

24

52

full color

EA

LED68x51-RGB

red

green

blue

60 each

colour

-

15

typ. 4V

typ. 4V

typ. 4V